Am I missing something here??

[LosIsATool 5,000+ posts]

Essentially, but no. And I thought we were talking about RF amps? Where did ZX come into play? And don't ZX's have a fixed SSF? I would go out of my way to avoid that. That's more limiting than not having one to me.

I was comparing birth sheets to birth sheets. I wouldn't imagine them to be that far off on what they really do. Even with the CP they still make less power at 2 ohm and the 1 ohm efficeny is real bad. It's basically the same as running a 1ohm amp at .5. Marketing